Boiler



Nov. 3, 1931. v A. MAGIS ET AL 1,829,379

BOILER Filed Feb. 7, 1929 INVEN TORJ' ATTORNEY.

V Patented Nov. 1 931 V imam MAGIS gum, ori'ramsi nancn; Assreiionsro HEATER company, or Yong.

Application fiieii 'reb iar 'z ez'e, e -am 338,145, and in France Eetruary 18, 1928. j

I Little effort been m-ade so far in steain ants and particularly in'movable plants to condense the exhaust steam by acomplete recuperation systemin orderto obtain the best possible economy. and also to close the circuit in order. to minimizethe necessary quantity of makeup -fluid.

' possible.

comot'ives, locomobiles,

A The present invention for its object .the provision of. a; generaton'makingfit possible to obtain a better production andnutili 1 zation of steam or any other fluid and to combinethe use of high pressures and high superheats with. as great; a" recuperations-as -.'This generator is.more"'particul arly applicable to movable: installationsasuch as automobiles, etc'.-, and

. comprises a certainnuinber of .boilersjor re'- heaters heated xbyhe'at exchangers' working on a closed jcyclel 'and'arranged consecutively in the pathofithe hot gases -comii1g from the furnace. Thisarrangeinentlpresents the fol, lowing essential feature that the. boilers are connected ,toreach lother; on thefgone ,ha idi at their lower, points to; permit the circulation of the feedwater which isintroduced intothe coolestboiler according toi 'the counter;cur-

rent prineiple-,.and ontheotherha'iji'd at their 7 higher points to equaliz e the steam pressures existing in the boilers.- i

The steam is taken 0a]abbvirtiieiwatr level of the hottest boiler to be taken iinto-a 'superheater and thence to the prime mover which may her-of the multiple expansion type and Whose cylinders of different pressure stages are thus arranged in series.

This disposition is-the reverse of that existing in multiple expansion engines used hitherto in combination witha generator comprising several boilers, since in theserformer cases the boilers areoonnected respectively to cylinders of idi'fl'erent pressure stages.

Complications of distribution and coupling i between two zfrom its Work in one of inherent in the separation cylinders are thus avoide y Moreover, it isthus possible to arrange successive stages a receiver for reheating of'the steam coming the stages and going of theboilers and intermediate to a further stage, by

means of. steam that The following description to' read in i connection with the accompanying drawing and given by way ofillustration will make it clear how this invention can be;carried The single figure of the drawingrepre, ,sents diagrammatically in longitudinal; section a steam generator according to the principles just stated. 1.

In this figure, g, designates the grate on whichthe combustible is burned andthe gases of combustion flow as indicatedby the-arrow f1 passing over .a first heat interchanger e1 .where the water, for example, is vaporized. This water will be condensed in the exchanger 62 locatedinthe boiler t1 and in condensing itvaporizes the water containedin the boiler andthus produces steam'at a-highi pressure.

The gases continuing their travel next pass over the superheater s where they; raise the temperatureqof the steam coming from the v high presure boiler 231 to a predetermined temi egenerator forming the su stages is in part condensed i-n 'a T -THE SUIER- directly fvo (.32 into the boiler where it is completely p -11"}; 1 It is evident thait theregmight be several boilers and several: closefdcircuit heat inter.-

cliangers working either'at'the same pressure 1 for the boiler goingto the stack h'forthis as inithe example givenor at diflerent pressures in parallel series COI'IQSPODdHI to erating power,

"r" where its temperatureis raised or for other purposesrz genheating or other purposes). p {In the formof the invention shown in the special engines *drawing,vthe two boilers t1, t2 communicate at their upper partsby the tube 01' and thus 'work at the same steam pressure just as at i he w r Pa ey ar slonnected by tube; a2 which permits thefeed water introdueed into the boiler $2 to pass from thatboiler intothe boiler $1 in response to the level difierence. resulting from the different rates ofvaporization. 1 r. is a" The steam produced in these boilers and superheated inthe superheater s is carried by theltube 03 to the highpressure engine m1 where it expands up toits saturationpoint doing a certain amount of work. i

"Theexhaust steam coming from the engine m1 is then carried by the pipe 04 to a reheater under the same pressure by means of a part'of high pressure steam taken, for example, from the pipec8 and conduotedb'y the pipe 05 into the exchanger-e5 of the reheater'where it is conden'sed, returning bythetubes 06 to the boiler it while still at a high temperature and practically under the pressure'of boiler t1. The

steain nsed for reheating may 'thusbe ad- 'vantageouslyjcirculated by a thermo-siphon;

effect through the interior of these exehangers. 7

From the exit from the reheater a the steam ftraveis by the pipe '07 to an engine m2 working at'a lower pressure where it expands fur- From the' outlet of the engine m2 a partof this steammay be used to generate the draft 7 V purposethrough; the pipe '08; the other part flowing-by means of, the pipe 09 to a preheater a for the combustion; air, in which the/air entering at the front and following thearrow f2is forced 'for' instaneeby the speed of-th'e locomotive,-under the grate 9 through 'a duct I {Theresult ngwater'next has its o-ilsepa- "b, while the exhaust steam coming from. the

pipees-is" cooled the-coil efiand leaves, by h V the pipe 010.

This air preheater may advantageously be v combined{with an air preheaterheatedby 3 waste gases-andin that casewould be placed heater cl whence it flows'to the chamber through the pipe 012.

This water is then forced by the vpump 19 into the boiler 252 where it may be again heated and vaporized. V

At ratings of the locomotive at which the boiler t2 evaporates water, the two boilers t1 and t2 might be arranged asa single boiler ze m nie t at e r. w r part t the hot water from tQ'might: travel into t1 where it wouldbe vaporized, these two .Iboilers also being in communication at their upper points so that the steam from tQ-might also flow to the engines;

It is quite evident that without passing outsideof th frame of this invention one could "provide a plurality of: successive expansions in different engines arranging-several intermediate reheaters to improve the economy.

in vthe section, portions connecting the two elements; each-appliance forming a closed circuit, and ga' fluid each ap 1 liance; afur- 113136 lwhose products of com ustiontouch the several heat-absorbing elements in successionf;.the several sections being alined shorizontally; means plaeingilthe s'eetions into yconnnunication both, above and belox'v the 7 level at, whichi'water is to bemaintained; an

inlet to supply water to the section farthest tronithe furnace; 'a'steam outlet from the section nearest to thefurnaceywheteby the several "sectionsfcan be maintained at the samepressure but different temperatures.

a w AUGUSTE]MAGIS.

' ANDRE I e in front of the" stack It so that the air would gases.

.be first heated by steam and thenby the hot I The steam then flows to'a water pre- I heaterwhereit gives'up part pr its heat to I 7 the water contained in the means of the coil 7..

preheater t} by j rated out by; means'of thes'eparator i and is Y then delivered into the chamber-7a which rev e'eiveswater coming. from the tenderbythe T tnb g l ai eritrhea-been hea in, t are 1 J a 

